#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "ourhdr.h"

char buf1[]= "abcdefghij";
char buf2[]= "ABCDEFGHIJ";

int main(void) {
    int fd;
    if ((fd= creat("file.hole", FILE_MODE)) < 0)
        err_sys("creat error");
    if (write(fd, buf1, 10) != 10)
        err_sys("buf1 write error");

    /* offset now = 10 */
    if (lseek(fd, 40, SEEK_SET) == -1)
        err_sys("lseek error");

    /* offset now = 40 */
    if (write(fd, buf2, 10) != 10)
        err_sys("buf2 write error");

    /* offset now = 50 */
    exit(0);
}
